Abstract

VASQUEZ A, Víctor; CABRERA H, Hector A; JIMENEZ D, Luis A  and  COLUNCHE, Albarino. Stability of tuber yields of potato genotypes (Solanum tuberosum L.). Ecol. apl. [online]. 2019, vol.18, n.1, pp.59-65. ISSN 1726-2216.  http://dx.doi.org/10.21707/rea.v18i1.1307.

The objective of this study was to determine the stability of experimental potato genotypes in four villages of La Encañada District, province and department of Cajamarca. During the 2005- 2006, 2006-2007, 2007-2008 and 2012-2013 campaigns, performance trials were evaluated in six contrasting environments. The genetic material consisted of six experimental genotypes from the Baños del Inca Experimental Station-INIA Cajamarca. The experimental design used was complete blocks at random with three repetitions. The experimental plots consisted of four rows of 3.0 m long, separated at 1.00 m. The combined analysis of variance proposed by Eberhart & Russell (1966), revealed statistical significance (P≤0.01) between environments, genotype and for the interaction genotype x environment (localities). The parameters of stability and adaptability identified the genotypes CAJ010.4 and CAJ004.4, as promising cultivars in favorable and inconsistent environments, with yields of 31.36 and 26.57 t•ha^-1. They were identified as the best environments for yield to the towns of Santa Clotilde and Chaquilpampa, for the values of their positive environmental indices and yields of 38.72 t•ha^-1 and 28.03 t•ha^-1, higher than the general average. ).

Keywords : genotype; environment; interaction; stability; performance.

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